Test-retest reliability of trunk accelerometry during standing and walking

摘要: Abstract Objective: To investigate repeatability of acceleration measured by a portable, triaxial accelerometer over the lumbar spine as measure balance during standing and walking. Design: Acceleration was along three axes transformed to horizontal-vertical coordinate system. Standing tested on two feet, vision unobstructed obstructed, one foot, unobstructed. Walking in five different self-selected speeds even uneven ground. Retest performed after 2 days. Setting: A flat floor with 7m mat. Subjects: Nineteen healthy students. Main Outcome Measures: Standing: root mean square (RMS). Walking: Point estimate RMS for reference walking speed (1.2m/sec). All tests: Within-subject standard deviation (S W ), intraclass correlation coefficients (ICCs). Results: The S w indicated high absolute test-retest feet. Because restricted ranges value, relative reliability low, however, ICC(3,1) Conclusion: results indicate that accelerometry without need stationary instrumentation is reliable method may be useful studying gait clinic.